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Commands slow in wait_sig.

Hello there,

I use Cygwin to do some complex text processing jobs using shell scripts on Thinkpad X200s Windows XP sp3. It had worked fine before but at some point I noticed the job started to take much time to complete. It is taking about ten times period compare to before. I don't know what had triggered this exactly.

$ while true ;do /usr/bin/date ;done|uniq -c
????? 1 Wed Aug? 3 16:21:05???? 2011
????? 1 Wed Aug? 3 16:21:06???? 2011
????? 1 Wed Aug? 3 16:21:08???? 2011
????? 1 Wed Aug? 3 16:21:09???? 2011
????? 1 Wed Aug? 3 16:21:10???? 2011
????? 2 Wed Aug? 3 16:21:11???? 2011
????? 1 Wed Aug? 3 16:21:12???? 2011
$ time date
Wed Aug? 3 16:23:19???? 2011
real??? 0m0.905s
user??? 0m0.077s
sys???? 0m0.562s

$ uname -a
CYGWIN_NT-5.1 IBM-8DE0336DAA4 1.7.9(0.237/5/3) 2011-03-29 10:10 i686 Cygwin
So one command take about 1 sec to complete. On other machines with similar configuration the above testing shows about 10 forks/sec on average.

The following is strace date information

?7070??? 9351 [main] date 1780 _cygtls::remove: wait 0xFFFFFFFF
?? 76??? 9427 [main] date 1780 _cygtls::remove: removed 0x22CE64 element 0
?? 64??? 9491 [main] date 1780 _cygtls::remove: wait 0xFFFFFFFF
?? 34??? 9525 [main] date 1780 _cygtls::remove: removed 0x22CE64 element 0
? 218??? 9743 [sig] date 1780 wait_sig: entering ReadFile loop, my_readsig 0x764, my_sendsig 0x760
332702? 342445 [main] date 1780 mount_info::conv_to_posix_path: conv_to_posix_path (C:\cygwin\home\admuser, no-keep-rel, no-add-slash)
?? 80? 342525 [main] date 1780 normalize_win32_path: C:\cygwin\home\admuser = normalize_win32_path (C:\cygwin\home\admuser)
? 165? 342690 [main] date 1780 mount_info::conv_to_posix_path: /home/admuser = conv_to_posix_path (C:\cygwin\home\admuser)
?2047? 344737 [main] date 1780 _cygwin_istext_for_stdio: fd 0: not open
It looks like that "wait_sig: entering ReadFile loop" taking much time in the command processing. So firstly I supposed "Slow performance Win7/64" discussion last month may apply to this. I tested 2011-08-01 snapshot and it doubled the performance like 2 forks/sec, but wait_sig still taking much time and I suspect there is another problem in the code or specific problem in my PC. I reviewed the code but it is hard for me to understand what is taking time after the ReadFile call. I confirmed my path doesn't have network server specification. My /home is on local. Once I reinstalled while cygwin binaries but problem did not go. What do I need to look to go ahead? I appreciate your help.

I attached strace, cygcheck output. I modified some userinformation in the files.

Best regards,


Attachment: strace.out
Description: Binary data

Attachment: cygcheck.out
Description: Binary data

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